Two types of bone breaks are fractures and complete breaks. Fractures are just cracks in the bone, but complete breaks are when the bone literally is broken in two pieces. You've shattered the bone if it's broken in more that two pieces.
Bones. If they have cracks in their bones, then the cracks will show up on an X-ray.
It breaks or cracks
Chiropractor.
knee bones
The word is chemical.
The rocks cracks on everything
As the water freezes in the cracks of rocks,the cracks expand. The process repeats itself and the rock eventually breaks.
A fissure.
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Osteoclast